package org.example.reggie.filter;

import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import org.example.reggie.common.BaseContext;
import org.example.reggie.common.R;
import org.example.reggie.pojo.Employee;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Slf4j
@WebFilter(filterName = "logincheckfiltre",urlPatterns = "/*") //过滤所有的请求
public class LoginCheckFilter implements Filter {

    public static final AntPathMatcher PATH_MATCHER = new AntPathMatcher(); //判断字符串是否相等的对象

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;

        String uri = request.getRequestURI();
        String[] urls = new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/fonts/**",
                "/common/**",
                "user/sendMsg",
                "user/login"
        };
        boolean check = check(urls, uri);
        if(check){
            filterChain.doFilter(request,response);
            return;
        }

        if(request.getSession().getAttribute("employee")!=null){

            Long id = (Long) request.getSession().getAttribute("employee");
            BaseContext.setThreadLocal(id);
            filterChain.doFilter(request,response);
            return;
        }
        if(request.getSession().getAttribute("user")!=null){

            Long id = (Long) request.getSession().getAttribute("user");
            BaseContext.setThreadLocal(id);
            filterChain.doFilter(request,response);
            return;
        }
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN"))); //写回页面，msg写回NOTLOGIN,页面自动跳转到登录页面
        return;
    }
    public boolean check(String[] urls,String uri) {

        for (String url : urls) {
            boolean match = PATH_MATCHER.match(url, uri);
            if (match) {
                return true;
            }
        }
        return false;
    }
}
